使用matplotlib

Question

條形圖上添加值標籤當我打印

graph_by_users = users.pivot(index='address', columns='used_at', values='users') 

我得到

   address used_at time online 
0    am.ru  2014 114.741944 
1    am.ru  2015  50.945000 
2    auto.ru  2014 2533.983889 
3    auto.ru  2015 1923.157500 
4   avito.ru  2014 23473.097500 
5   avito.ru  2015 24357.936389 
6  avtomarket.ru  2014  29.680278 
7  avtomarket.ru  2015  26.646389 
8 cars.mail.ru/sale  2014  58.737778 
9 cars.mail.ru/sale  2015  46.466111 
10   drom.ru  2014 3059.709722 
11   drom.ru  2015 2695.590000 
12    e1.ru  2014 7966.210278 
13    e1.ru  2015 7767.182500 
14  irr.ru/cars  2014  61.720278 
15  irr.ru/cars  2015  37.132778 

我需要打印條形圖

ax = graph_by_duration.plot.bar(width=0.5, ax=axes[0]) 
ax1 = graph_by_duration.plot.bar(width=0.8) 
rects = ax1.patches 
labels = ["%d" % i for i in time['time online']] 
for rect, label in zip(rects, labels): 
    height = rect.get_height() 
    ax1.text(rect.get_x() + rect.get_width()/2, height + 5, label,  
    ha='center', va='bottom') 

它把值2014和之後到2015。但這是錯誤的，因爲在我的數據框中意味着混合

Answer 1

我認爲你混淆了你的標籤。試試這個：

ax = graph_by_duration.plot(kind='bar', width=0.5) 
[label.set_rotation(25) for label in ax.get_xticklabels()] 

labels = [int(round(graph_by_duration.loc[i, y])) 
      for y in graph_by_duration.columns.tolist() 
      for i in graph_by_duration.index] 

for rect, label in zip(rects, labels): 
    height = rect.get_height() 
    ax.text(rect.get_x() + rect.get_width()/2, height + 5, label,  
    ha='center', va='bottom', rotation=15) 

plt.show()